Microsoft will block TLS 1.0 and 1.1 in Exchange Online by July 2026, requiring organizations to upgrade to TLS 1.2 or higher ...

Microsoft will block POP3 and IMAP4 connections using legacy TLS 1.0 or 1.1 in Exchange Online from July 2026, ending its ...

Microsoft announced plans to deprecate legacy Transport Layer Security (TLS) versions and older endpoints for POP3 and IMAP4 connections in Exchange Online, as part of ongoing eff ...

Outlook's backend is dropping outdated security protocols soon, and organizations still relying on them could face sudden ...

ECH encrypts the TLS handshake, backends speak HTTP/2, and Multipath TCP uses multiple network paths in parallel.